'Marriage isn't important to me': Cameron Diaz says she's happy to be single while posing in nude swimsuit

As she displays her long limbs in a plunging one-piece swimsuit, it’s hard to believe that Cameron Diaz is nearing the big 40, but the Hollywood beauty has proved age is only a number.

Her Californian-girl tan was off set against a sexy nude costume, which boasted fringing down her décolletage as the actress posed for the latest issue of Cosmopolitan magazine.

And as she hit the headlines this week over allegedly splitting with her boyfriend of a year Alex Rodriguez, Diaz says that marriage hasn't been important to her because it only limits 'other possibilities'.

Ageing gracefully: The 38-year-old actress shows off her enviable figure in a nude swimsuit, that would make women less than half her age cringe with jealously

Despite being one of Hollywood’s most
successful and beautiful actresses, she has openly spoken of her
reluctance to settle down at 38-years-old.

Diaz, who has reportedly split from the New York
Yankees baseball star, says: ‘Marriage hasn’t
been important to me. I believe we are with who we’re supposed to be
when we’re supposed to be with them.

‘If I try and lock something down, I miss out on all the possibilities of what it could be.’

And
when it comes to children, she explained: ‘You can’t have a child just
because you think it’s something you’re supposed to do.

‘It
doesn’t make sense for everyone it’s not an absolute for me…. I don’t’
care what other people think. It’s my life; I live it the way I want
to.’

Casual chic: Cameron Diaz is just as glamorous in casual jeans and a white vest than she does on the red carpet or in her sexy swimsuit

Full interview appears in the July issue of Cosmopolitan, on sale 5th July

A source told Perez Hilton's website fitperez.com of Cameron and A-Rod, saying: 'They've broken up. (Cameron is) hurt and betrayed, because she tried so hard to please him. She went overboard.'

But the star has yet to confirm speculation.

While promoting her upcoming film Bad
Teacher, Cameron has also revealed how she feels about getting older and
why she's not interested in marriage.

She said: ‘You get better as you age. You know what you want and you become stronger, mentally and physically.

‘Things have happened recently that
have pushed me to grow. My father died and going through that made me
think about how I want to live my life.’

There’s
no doubt that the star is physically fitter than we’ve ever seen her
before and looks just as glamorous in her scruffy jeans and vests as in a
designer bikini.

Cameron has always been a lithe lady, but over the past few years has developed into a full-blown fitness junkie without an ounce of fat on her.

She says that she’s always worked out but woke up one day and realised, ‘while I looked fine, eating the way I was didn’t make me feel fine. So, you know, I just stopped eating it.’

Marriage not for me: Cameron, who has reportedly split from New York Yankees baseball star Alex Rodriguez, says that she is not fussed about getting married

Her upcoming film Bad Teacher shows
Diaz playing a teacher, who starts her own ‘new boobs’ fund after
discovering that the object of her affections - a substitute teacher
played by Justin Timberlake, is interested in women with considerably
bigger assets than her own.

She says of the role: ‘C’mon, you don’t think there are teachers out there who get high at her school or want a boob job?

‘I was drawn to her because she’s real. She lives how she wants and doesn’t apologise for it. I liked that she isn’t a totally changed woman at the end of the film, because that’s just not realistic.’

Cameron’s full interview appears in the July issue of Cosmopolitan, on sale 5th July.